Destroy over 99.9% of viruses, bacteria, and protozoan cysts in water using ultraviolet light with the Classic 3 UV Water Purifier from SteriPEN. This water treatment device comes complete with a 40 x 40-micron screen Pre-Filter, and does not utilize any harmful chemicals. The UV sterilization process won't change the taste, odor or color of the water. The unit is operated on four user supplied AA batteries, which are easily replaced when needed. It is suitable for hikes, travel, or any situation when pure, drinkable water is not available. The purifier comes with SteriPEN's Premium Lamp Life Pledge; so when you reach the lamp's lifespan of 8,000 treatments, SteriPEN will replace it with a new unit.

The Pre-Filter fits perfectly on wide-mouth, one-liter water bottles and removes particulates that can get in the way of UV light in water. It is designed to be stored directly on the bottle, and the SteriPEN Classic 3 fits perfectly in the filter. Just insert Classic 3 in the filter opening, turn the bottle upside down, and gently rock to circulate light throughout bottle.